Logged In: YES 
user_id=1185570

I'm going to address your points top to bottom:
1. Fixed, you're right it should and does now.
2. The idea of a list wrapper is to serve as a convenient
interface to the most commonly used methods of a poplib
instance while hiding the underlying class(es).
3. Subclassing list was a mistake, I was merely trying to
provide an idea for the interface. Summarily removed.
4. __getslice__ fixed.
5. Unit tests will take a little longer because we need to
make a dummy poplib instances to test with.
6. __getattribute__ docstring dropped.
7. I don't know, should it?